Vehicle-brake.



0. PRASCHINI.

lVBHIGLE BRAKE. APPLICATION FILED FEB.13, 1911.

L1 @,75 1L; Patented July 14; 1914.

2 SHEETS-SHEET 1.

0. FRASCHINI.

VBHIGLE BRAKE, APPLICATION FILED PB B. 13, 1911.

Patented July 14, 1914 2 SHEETS-SHEET 2.

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onns're rnescmm, or n,

CLE-BR.

Specification of Letters Patent.

ipplteetion filed February 13, 1911.

To all 'wh om it may concern: v

lle it. known that l. Unnsri: Fnasomm, a Subject of the King of italy,residing at 79 Via lllonterosa. Milan, in the Kingdom of ltaly, haveinvented certain new and useful improvements in Vehicle-Brakes.. ofwhich the following is a specification.

The use of brakes on the iront steering wheels ot automobile vehicleshas heretofore been ditliciilt and complicated in view of the fact thatthe mechanism tor steering the. wheels must necessarily' be independentof the operation of the brakes. ln other words, the movement of thesteering gear for the wheels must never influence in any way theoperation of the brakes and vice versa. The device which forms theobject of the present invention solves this problem in an exceedinglysimple manner. This device is represented diagrammaticallv in theaccompanyin tr drawing which illustrates one of its applications h v wayof example.

lt will of course be understood that constructional details can hemodified and that such other modifications as are necessary in view ofthe use of other types of brake might he adopted without departing fromthe limits of the invention.

Figure l is a front elevation showing the brake fitted to one of thedrums` mounted on the spindle. Fig. 2 shows the wheel and the brake insection. Fig. 3 represents a wheel in process of turning and the brakein section. Fig. l is a general plan view of the front axle and wheels.

Taking b v way of example an expansion brake which acts by means of twobrake shoes on the interior' of the drtlm- T fixed to the spokes A' ofthe front steering wheel the two shoes are articula-ted'nt their upperends to a pivot l fixed to the hinged arm b which forms pai-tof thespindle of the wheel. The lower ends s. x' of the shoes are pressedinwardly against the cam l1 under the influence of the springs -n n 'n2n3. li'hen the brake is inoperative the said ends .e e' bear upon thetwotlat faces ofthe cum h which are nearest tothe center of said cam,but when the lutter is turned. the said shoe ends are forced away fromeach other and consequently the shoes are applied to the inner peripheryot the drum 'l` and oct as a brake. Y

lin order to permit the wheel to oscillete on the pivot e withoutinhuencing the brakes it is necessary that, the cam li or other devicetor acting upon the brake shoes should not experience any displacementat an steering angle Whatever. Similarly it should be, possible to act`lireely upon the brakes whatever the position ot the wheel may be. Thisresult is obtained in the tollowing manner: A pivot f supported andguided for example by the axle o which carries the Wheel A is providedat, its extremity with a member g which is in the torno of esubstantially rectangular body or portion provided with rounded ends.'llhe center of the member g is located in line with or very nearly inline with the axis ot the pivot e on which the wheel oscilletes. Thesaid member r/ enters a square hole .located at the center of the camli. This constitutes a perfeet Cardan joint which enables an movement ofrotation to betransmitted rom the pivot f to the cani h whatever theangle of inclination between the pivot f itself and the horizontalaxisot the cam may he (Fig. 3). The tardan joint may also he of the typecomprising fixed pivots or nuts or ot any other type. ln the caserepresented in the drawing the member g might also act directly upon theends s s' of the shoes thus acting as a cam.

Fig. -l represents diagrammatically the front axle as a whole withbrakes fitted to each wheel.- The levers m m serve to control the twoVpivots lf.A By acting upon the, two rods l1' i" by means of a pedal orof a hand lever the two brakes are operated thus braking the entireforecarriage.

What l claim and desire to secure-by lietters Patent of the lnitedStates is :f-

1. device for controlling brakes fitted to the steering wheels otvehicles comprising. in combination with an axle. and a revoluble andoscillatory wheel connected thereto; a drum connected to said wheel; amemher carried by said axle; a pair of brake shoes pivoted to saidmember; an aperturetl. rotatable cam having curved and dat facesthereonz-and a second com oscillating within the aperture in the firstcam and adapted to operate the same in such a manner as to produce thebraking ot the Wheels at any angle.

Q. fit device for controlling brakes tted to the Steering wheels ofvehicles comprising` in combination with an axle, and a revoluble andoscillatory wheel connected thereto; a drum connected to said wheel: amember carried by seid axle: a pair of brake Patented. italy itil.lglliv shoesvoted to said member; a cam situated betwn the ends of saidshoes; and a member movably connected tos'aid cam and adapted to move inrelation thereto for op- 5 eratmg the cam.

3. A device orcontrolling brakes fitted to -the stee'sring' wheels of'vehicles comprisin in combination with an axle, and a revolube andoscillatory. Wheel connected thereto; a

the aperture in said cam; and a shaft hav-y ing a xed axis of rotationconnected to the 11.0 drum connected to said wheel; av member carried bysaid axle; a pair of brake shoes pivoted to said member and havingangedends; a cam situated between the inged ende of said brake shoes;and an' internal oscillatory member for rotating the same and said cam.

In testimony' whereof l aix my signature 30 in presenceof two witnesses.

La mamme oscillating within lsaid @am and @RESTE FRASM' adapted tooperate lthe same when rotated. Witnesses:

' 4. A device for contro brakes fitted R. Celano SALvofrm; bo the'steering wheels ojvehic es comprising, 'l nn Famos.

